Redirect the source of the Ads to your computer by adding the following entries in the hosts file:
127.0.0.1 m.adnxs.com
127.0.0.1 ib.adnxs.com
127.0.0.1 pixel.alephd.com
127.0.0.1 apps.skype.com
127.0.0.1 rad.msn.com

WixStandardBootstrapperApplication has three variants as explained in the WiX Manual. HyperlinkLicense is the simplest. It has a license link on the welcome page instead of a license page. It allows you to specify an empty URL for the license, in which case it would not display the link.